Chapter 7: Trigonometry & Trigonometry Formulas - Math Mcqs for Grade 8

1.

For the Cosine Rule of any triangle ABC, the b² is equal to

A. a² - c² + 2ab cos A

B. a³ + c³ - 3ab cos A

C. a² + c² - 2ac cos B

D. a² - c² 4bc cos A

Answer & Solution Discuss in Board

2.

For the Cosine Rule of any triangle ABC, the c² is equal to

A. c² + a² + 2ac cos C

B. a² + b² - 2ab cos C

C. a² + b² + 2ab cos A

D. a² - b² + 2ab sin A

Answer & Solution Discuss in Board

3.

In a triangle ABC, if angle A = 72° , angle B = 48° and c = 9 cm then the Ĉ is

A. 69°

B. 66°

C. 60°

D. 63°

Answer & Solution Discuss in Board

4.

Considering The Cosine Rule of any triangle ABC, the possible measures of angle A includes

A. angle A is obtuse

B. angle A is acute

C. angle A is right-angle

D. all of above

Answer & Solution Discuss in Board

5.

The sine rule for a triangle states that

A. a/sin A = b/sin B = c/sin C

B. sin A/a = sin B/b = sin C/c

C. a/sin A + b/sin B + c/sin C

D. 2a/sin A = 2b/sin B = 2c/sin C

Answer & Solution Discuss in Board

6.

By expressing the sin 125° in terms of trigonometrical ratios, the answer will be

A. sin 65° = 0.9128

B. sin 55° = 0.8192

C. sin 70° = 0.5384

D. sin 72° = 0.1982

Answer & Solution Discuss in Board

7.

By expressing the cos 113° in terms of trigonometrical ratios, the answer will be

A. − cos 76° = -0.7093

B. − cos 65° = -0.4258

C. − cos 67° = -0.3907

D. − cos 62° = -0.8520

Answer & Solution Discuss in Board

8.

For the Cosine Rule of any triangle ABC, the a² is equal to

A. b² + c² - 2bc cos A

B. b² + a² - 2ac cos A

C. b³ + c³ - 2bc cos B

D. b² - c² + 3bc cos C

Answer & Solution Discuss in Board

9.

The Cosine Rule is also known as

A. Sine triangle

B. Cosine Formula

C. Cosine Triangle

D. Cosine Area

Answer & Solution Discuss in Board

10.

If the sine is 0.896 then the value of acute angle is

A. 78°

B. 72°

C. 63.64°

D. 65°

Answer & Solution Discuss in Board

Practice MCQ Questions and answers on Chapter 7: Trigonometry & Trigonometry Formulas - Math Mcqs for Grade 8

1. For the Cosine Rule of any triangle ABC, the b² is equal to

Answer & Solution

2. For the Cosine Rule of any triangle ABC, the c² is equal to

Answer & Solution

3. In a triangle ABC, if angle A = 72° , angle B = 48° and c = 9 cm then the Ĉ is

Answer & Solution

4. Considering The Cosine Rule of any triangle ABC, the possible measures of angle A includes

Answer & Solution

5. The sine rule for a triangle states that

Answer & Solution

6. By expressing the sin 125° in terms of trigonometrical ratios, the answer will be

Answer & Solution

7. By expressing the cos 113° in terms of trigonometrical ratios, the answer will be

Answer & Solution

8. For the Cosine Rule of any triangle ABC, the a² is equal to

Answer & Solution

9. The Cosine Rule is also known as

Answer & Solution

10. If the sine is 0.896 then the value of acute angle is

Answer & Solution

Read More Section(Mathematics Quizzes)

1.

For the Cosine Rule of any triangle ABC, the b² is equal to

2.

For the Cosine Rule of any triangle ABC, the c² is equal to

3.

In a triangle ABC, if angle A = 72° , angle B = 48° and c = 9 cm then the Ĉ is

4.

Considering The Cosine Rule of any triangle ABC, the possible measures of angle A includes

5.

The sine rule for a triangle states that

6.

By expressing the sin 125° in terms of trigonometrical ratios, the answer will be

7.

By expressing the cos 113° in terms of trigonometrical ratios, the answer will be

8.

For the Cosine Rule of any triangle ABC, the a² is equal to

9.

The Cosine Rule is also known as

10.

If the sine is 0.896 then the value of acute angle is